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Comet Shoemaker-Levy 9 was discovered in 1993 by the three comet-hunters. From July 16-22, 1994, the comet put on a spectacular show. It had been torn apart by Jupiter’s gravity, and its remaining 21 pieces collided with the massive planet. It was the first collision of two solar system bodies ever to be observed.

The free event, hosted by the Royal Astronomical Society of Canada, begins at 7:30 p.m. Doors open at 6:30 p.m.